<?php
class ms_snoopy
{
    /**** Public variables ****/
    /* user definable vars */
    var $host = "www.php.net"; // host name we are connecting to
    var $port = 80; // port we are connecting to
    var $proxy_host = ""; // proxy host to use
    var $proxy_port = ""; // proxy port to use
    var $proxy_user = ""; // proxy user to use
    var $proxy_pass = ""; // proxy password to use
    var $agent = "Snoopy v1.2.4"; // agent we masquerade as
    var $referer = ""; // referer info to pass
    var $cookies = array(); // array of cookies to pass
    // $cookies["username"]="joe";
    var $rawheaders = array(); // array of raw headers to send
    // $rawheaders["Content-type"]="text/html";
    var $maxredirs = 5; // http redirection depth maximum. 0 = disallow
    var $lastredirectaddr = ""; // contains address of last redirected address
    var $offsiteok = true; // allows redirection off-site
    var $maxframes = 0; // frame content depth maximum. 0 = disallow
    var $expandlinks = true; // expand links to fully qualified URLs.
    // this only applies to fetchlinks()
    // submitlinks(), and submittext()
    var $passcookies = true; // pass set cookies back through redirects
    // NOTE: this currently does not respect
    // dates, domains or paths.
    var $user = ""; // user for http authentication
    var $pass = ""; // password for http authentication
    // http accept types
    var $accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*";
    var $results = ""; // where the content is put
    var $error = ""; // error messages sent here
    var $response_code = ""; // response code returned from server
    var $headers = array(); // headers returned from server sent here
    var $maxlength = 500000; // max return data length (body)
    var $read_timeout = 0; // timeout on read operations, in seconds
    // supported only since PHP 4 Beta 4
    // set to 0 to disallow timeouts
    var $timed_out = false; // if a read operation timed out
    var $status = 0; // http request status
    var $temp_dir = "/tmp"; // temporary directory that the webserver
    // has permission to write to.
    // under Windows, this should be C:\temp
    var $curl_path = "/usr/local/bin/curl";
    // Snoopy will use cURL for fetching
    // SSL content if a full system path to
    // the cURL binary is supplied here.
    // set to false if you do not have
    // cURL installed. See http://curl.haxx.se
    // for details on installing cURL.
    // Snoopy does *not* use the cURL
    // library functions built into php,
    // as these functions are not stable
    // as of this Snoopy release.
    /**** Private variables ****/
    var $_maxlinelen = 4096; // max line length (headers)
    var $_httpmethod = "GET"; // default http request method
    var $_httpversion = "HTTP/1.0"; // default http request version
    var $_submit_method = "POST"; // default submit method
    var $_submit_type = "application/x-www-form-urlencoded"; // default submit type
    var $_mime_boundary = ""; // MIME boundary for multipart/form-data submit type
    var $_redirectaddr = false; // will be set if page fetched is a redirect
    var $_redirectdepth = 0; // increments on an http redirect
    var $_frameurls = array(); // frame src urls
    var $_framedepth = 0; // increments on frame depth
    var $_isproxy = false; // set if using a proxy server
    var $_fp_timeout = 30; // timeout for socket connection
    /*======================================================================*\
	Function:	fetch
	Purpose:	fetch the contents of a web page
				(and possibly other protocols in the
				future like ftp, nntp, gopher, etc.)
	Input:		$URI	the location of the page to fetch
	Output:		$this->results	the output text from the fetch
\*======================================================================*/
    function fetch ($URI)
    {
        //preg_match("|^([^:]+)://([^:/]+)(:[\d]+)*(.*)|",$URI,$URI_PARTS);
        $URI_PARTS = parse_url($URI);
        if (! empty($URI_PARTS["user"]))
            $this->user = $URI_PARTS["user"];
        if (! empty($URI_PARTS["pass"]))
            $this->pass = $URI_PARTS["pass"];
        if (empty($URI_PARTS["query"]))
            $URI_PARTS["query"] = '';
        if (empty($URI_PARTS["path"]))
            $URI_PARTS["path"] = '';
        switch (strtolower($URI_PARTS["scheme"])) {
            case "http":
                $this->host = $URI_PARTS["host"];
                if (! empty($URI_PARTS["port"]))
                    $this->port = $URI_PARTS["port"];
                if ($this->_connect($fp)) {
                    if ($this->_isproxy) {
                        // using proxy, send entire URI
                        $this->_httprequest($URI, $fp, $URI, $this->_httpmethod);
                    } else {
                        $path = $URI_PARTS["path"] . ($URI_PARTS["query"] ? "?" . $URI_PARTS["query"] : "");
                        // no proxy, send only the path
                        $this->_httprequest($path, $fp, $URI, $this->_httpmethod);
                    }
                    $this->_disconnect($fp);
                    if ($this->_redirectaddr) {
                        /* url was redirected, check if we've hit the max depth */
                        if ($this->maxredirs > $this->_redirectdepth) {
                            // only follow redirect if it's on this site, or offsiteok is true
                            if (preg_match("|^http://" . preg_quote($this->host) . "|i", $this->_redirectaddr) || $this->offsiteok) {
                                /* follow the redirect */
                                $this->_redirectdepth ++;
                                $this->lastredirectaddr = $this->_redirectaddr;
                                $this->fetch($this->_redirectaddr);
                            }
                        }
                    }
                    if ($this->_framedepth < $this->maxframes && count($this->_frameurls) > 0) {
                        $frameurls = $this->_frameurls;
                        $this->_frameurls = array();
                        while (list (, $frameurl) = each($frameurls)) {
                            if ($this->_framedepth < $this->maxframes) {
                                $this->fetch($frameurl);
                                $this->_framedepth ++;
                            } else
                                break;
                        }
                    }
                } else {
                    return false;
                }
                return true;
                break;
            case "https":
                if (! $this->curl_path)
                    return false;
                if (function_exists("is_executable"))
                    if (! is_executable($this->curl_path))
                        return false;
                $this->host = $URI_PARTS["host"];
                if (! empty($URI_PARTS["port"]))
                    $this->port = $URI_PARTS["port"];
                if ($this->_isproxy) {
                    // using proxy, send entire URI
                    $this->_httpsrequest($URI, $URI, $this->_httpmethod);
                } else {
                    $path = $URI_PARTS["path"] . ($URI_PARTS["query"] ? "?" . $URI_PARTS["query"] : "");
                    // no proxy, send only the path
                    $this->_httpsrequest($path, $URI, $this->_httpmethod);
                }
                if ($this->_redirectaddr) {
                    /* url was redirected, check if we've hit the max depth */
                    if ($this->maxredirs > $this->_redirectdepth) {
                        // only follow redirect if it's on this site, or offsiteok is true
                        if (preg_match("|^http://" . preg_quote($this->host) . "|i", $this->_redirectaddr) || $this->offsiteok) {
                            /* follow the redirect */
                            $this->_redirectdepth ++;
                            $this->lastredirectaddr = $this->_redirectaddr;
                            $this->fetch($this->_redirectaddr);
                        }
                    }
                }
                if ($this->_framedepth < $this->maxframes && count($this->_frameurls) > 0) {
                    $frameurls = $this->_frameurls;
                    $this->_frameurls = array();
                    while (list (, $frameurl) = each($frameurls)) {
                        if ($this->_framedepth < $this->maxframes) {
                            $this->fetch($frameurl);
                            $this->_framedepth ++;
                        } else
                            break;
                    }
                }
                return true;
                break;
            default:
                // not a valid protocol
                $this->error = 'Invalid protocol "' . $URI_PARTS["scheme"] . '"\n';
                return false;
                break;
        }
        return true;
    }
    /*======================================================================*\
	Function:	submit
	Purpose:	submit an http form
	Input:		$URI	the location to post the data
				$formvars	the formvars to use.
					format: $formvars["var"] = "val";
				$formfiles  an array of files to submit
					format: $formfiles["var"] = "/dir/filename.ext";
	Output:		$this->results	the text output from the post
\*======================================================================*/
    function submit ($URI, $formvars = "", $formfiles = "")
    {
        unset($postdata);
        $postdata = $this->_prepare_post_body($formvars, $formfiles);
        $URI_PARTS = parse_url($URI);
        if (! empty($URI_PARTS["user"]))
            $this->user = $URI_PARTS["user"];
        if (! empty($URI_PARTS["pass"]))
            $this->pass = $URI_PARTS["pass"];
        if (empty($URI_PARTS["query"]))
            $URI_PARTS["query"] = '';
        if (empty($URI_PARTS["path"]))
            $URI_PARTS["path"] = '';
        switch (strtolower($URI_PARTS["scheme"])) {
            case "http":
                $this->host = $URI_PARTS["host"];
                if (! empty($URI_PARTS["port"]))
                    $this->port = $URI_PARTS["port"];
                if ($this->_connect($fp)) {
                    if ($this->_isproxy) {
                        // using proxy, send entire URI
                        $this->_httprequest($URI, $fp, $URI, $this->_submit_method, $this->_submit_type, $postdata);
                    } else {
                        $path = $URI_PARTS["path"] . ($URI_PARTS["query"] ? "?" . $URI_PARTS["query"] : "");
                        // no proxy, send only the path
                        $this->_httprequest($path, $fp, $URI, $this->_submit_method, $this->_submit_type, $postdata);
                    }
                    $this->_disconnect($fp);
                    if ($this->_redirectaddr) {
                        /* url was redirected, check if we've hit the max depth */
                        if ($this->maxredirs > $this->_redirectdepth) {
                            if (! preg_match("|^" . $URI_PARTS["scheme"] . "://|", $this->_redirectaddr))
                                $this->_redirectaddr = $this->_expandlinks($this->_redirectaddr, $URI_PARTS["scheme"] . "://" . $URI_PARTS["host"]);
                                // only follow redirect if it's on this site, or offsiteok is true
                            if (preg_match("|^http://" . preg_quote($this->host) . "|i", $this->_redirectaddr) || $this->offsiteok) {
                                /* follow the redirect */
                                $this->_redirectdepth ++;
                                $this->lastredirectaddr = $this->_redirectaddr;
                                if (strpos($this->_redirectaddr, "?") > 0)
                                    $this->fetch($this->_redirectaddr); // the redirect has changed the request method from post to get
                                else
                                    $this->submit($this->_redirectaddr, $formvars, $formfiles);
                            }
                        }
                    }
                    if ($this->_framedepth < $this->maxframes && count($this->_frameurls) > 0) {
                        $frameurls = $this->_frameurls;
                        $this->_frameurls = array();
                        while (list (, $frameurl) = each($frameurls)) {
                            if ($this->_framedepth < $this->maxframes) {
                                $this->fetch($frameurl);
                                $this->_framedepth ++;
                            } else
                                break;
                        }
                    }
                } else {
                    return false;
                }
                return true;
                break;
            case "https":
                if (! $this->curl_path)
                    return false;
                if (function_exists("is_executable"))
                    if (! is_executable($this->curl_path))
                        return false;
                $this->host = $URI_PARTS["host"];
                if (! empty($URI_PARTS["port"]))
                    $this->port = $URI_PARTS["port"];
                if ($this->_isproxy) {
                    // using proxy, send entire URI
                    $this->_httpsrequest($URI, $URI, $this->_submit_method, $this->_submit_type, $postdata);
                } else {
                    $path = $URI_PARTS["path"] . ($URI_PARTS["query"] ? "?" . $URI_PARTS["query"] : "");
                    // no proxy, send only the path
                    $this->_httpsrequest($path, $URI, $this->_submit_method, $this->_submit_type, $postdata);
                }
                if ($this->_redirectaddr) {
                    /* url was redirected, check if we've hit the max depth */
                    if ($this->maxredirs > $this->_redirectdepth) {
                        if (! preg_match("|^" . $URI_PARTS["scheme"] . "://|", $this->_redirectaddr))
                            $this->_redirectaddr = $this->_expandlinks($this->_redirectaddr, $URI_PARTS["scheme"] . "://" . $URI_PARTS["host"]);
                            // only follow redirect if it's on this site, or offsiteok is true
                        if (preg_match("|^http://" . preg_quote($this->host) . "|i", $this->_redirectaddr) || $this->offsiteok) {
                            /* follow the redirect */
                            $this->_redirectdepth ++;
                            $this->lastredirectaddr = $this->_redirectaddr;
                            if (strpos($this->_redirectaddr, "?") > 0)
                                $this->fetch($this->_redirectaddr); // the redirect has changed the request method from post to get
                            else
                                $this->submit($this->_redirectaddr, $formvars, $formfiles);
                        }
                    }
                }
                if ($this->_framedepth < $this->maxframes && count($this->_frameurls) > 0) {
                    $frameurls = $this->_frameurls;
                    $this->_frameurls = array();
                    while (list (, $frameurl) = each($frameurls)) {
                        if ($this->_framedepth < $this->maxframes) {
                            $this->fetch($frameurl);
                            $this->_framedepth ++;
                        } else
                            break;
                    }
                }
                return true;
                break;
            default:
                // not a valid protocol
                $this->error = 'Invalid protocol "' . $URI_PARTS["scheme"] . '"\n';
                return false;
                break;
        }
        return true;
    }
    /*======================================================================*\
	Function:	fetchlinks
	Purpose:	fetch the links from a web page
	Input:		$URI	where you are fetching from
	Output:		$this->results	an array of the URLs
\*======================================================================*/
    function fetchlinks ($URI)
    {
        if ($this->fetch($URI)) {
            if ($this->lastredirectaddr)
                $URI = $this->lastredirectaddr;
            if (is_array($this->results)) {
                for ($x = 0; $x < count($this->results); $x ++)
                    $this->results[$x] = $this->_striplinks($this->results[$x]);
            } else
                $this->results = $this->_striplinks($this->results);
            if ($this->expandlinks)
                $this->results = $this->_expandlinks($this->results, $URI);
            return true;
        } else
            return false;
    }
    /*======================================================================*\
	Function:	fetchform
	Purpose:	fetch the form elements from a web page
	Input:		$URI	where you are fetching from
	Output:		$this->results	the resulting html form
\*======================================================================*/
    function fetchform ($URI)
    {
        if ($this->fetch($URI)) {
            if (is_array($this->results)) {
                for ($x = 0; $x < count($this->results); $x ++)
                    $this->results[$x] = $this->_stripform($this->results[$x]);
            } else
                $this->results = $this->_stripform($this->results);
            return true;
        } else
            return false;
    }
    /*======================================================================*\
	Function:	fetchtext
	Purpose:	fetch the text from a web page, stripping the links
	Input:		$URI	where you are fetching from
	Output:		$this->results	the text from the web page
\*======================================================================*/
    function fetchtext ($URI)
    {
        if ($this->fetch($URI)) {
            if (is_array($this->results)) {
                for ($x = 0; $x < count($this->results); $x ++)
                    $this->results[$x] = $this->_striptext($this->results[$x]);
            } else
                $this->results = $this->_striptext($this->results);
            return true;
        } else
            return false;
    }
    /*======================================================================*\
	Function:	submitlinks
	Purpose:	grab links from a form submission
	Input:		$URI	where you are submitting from
	Output:		$this->results	an array of the links from the post
\*======================================================================*/
    function submitlinks ($URI, $formvars = "", $formfiles = "")
    {
        if ($this->submit($URI, $formvars, $formfiles)) {
            if ($this->lastredirectaddr)
                $URI = $this->lastredirectaddr;
            if (is_array($this->results)) {
                for ($x = 0; $x < count($this->results); $x ++) {
                    $this->results[$x] = $this->_striplinks($this->results[$x]);
                    if ($this->expandlinks)
                        $this->results[$x] = $this->_expandlinks($this->results[$x], $URI);
                }
            } else {
                $this->results = $this->_striplinks($this->results);
                if ($this->expandlinks)
                    $this->results = $this->_expandlinks($this->results, $URI);
            }
            return true;
        } else
            return false;
    }
    /*======================================================================*\
	Function:	submittext
	Purpose:	grab text from a form submission
	Input:		$URI	where you are submitting from
	Output:		$this->results	the text from the web page
\*======================================================================*/
    function submittext ($URI, $formvars = "", $formfiles = "")
    {
        if ($this->submit($URI, $formvars, $formfiles)) {
            if ($this->lastredirectaddr)
                $URI = $this->lastredirectaddr;
            if (is_array($this->results)) {
                for ($x = 0; $x < count($this->results); $x ++) {
                    $this->results[$x] = $this->_striptext($this->results[$x]);
                    if ($this->expandlinks)
                        $this->results[$x] = $this->_expandlinks($this->results[$x], $URI);
                }
            } else {
                $this->results = $this->_striptext($this->results);
                if ($this->expandlinks)
                    $this->results = $this->_expandlinks($this->results, $URI);
            }
            return true;
        } else
            return false;
    }
    /*======================================================================*\
	Function:	set_submit_multipart
	Purpose:	Set the form submission content type to
				multipart/form-data
\*======================================================================*/
    function set_submit_multipart ()
    {
        $this->_submit_type = "multipart/form-data";
    }
    /*======================================================================*\
	Function:	set_submit_normal
	Purpose:	Set the form submission content type to
				application/x-www-form-urlencoded
\*======================================================================*/
    function set_submit_normal ()
    {
        $this->_submit_type = "application/x-www-form-urlencoded";
    }
    /*======================================================================*\
	Private functions
\*======================================================================*/
    /*======================================================================*\
	Function:	_striplinks
	Purpose:	strip the hyperlinks from an html document
	Input:		$document	document to strip.
	Output:		$match		an array of the links
\*======================================================================*/
    function _striplinks ($document)
    {
        preg_match_all("'<\s*a\s.*?href\s*=\s*			# find <a href=
([\"\'])?					# find single or double quote
(?(1) (.*?)\\1 | ([^\s\>]+))		# if quote found, match up to next matching
					# quote, otherwise match up to next space
'isx", $document, $links);
        // catenate the non-empty matches from the conditional subpattern
        while (list ($key, $val) = each($links[2])) {
            if (! empty($val))
                $match[] = $val;
        }
        while (list ($key, $val) = each($links[3])) {
            if (! empty($val))
                $match[] = $val;
        }
        // return the links
        return $match;
    }
    /*======================================================================*\
	Function:	_stripform
	Purpose:	strip the form elements from an html document
	Input:		$document	document to strip.
	Output:		$match		an array of the links
\*======================================================================*/
    function _stripform ($document)
    {
        preg_match_all("'<\/?(FORM|INPUT|SELECT|TEXTAREA|(OPTION))[^<>]*>(?(2)(.*(?=<\/?(option|select)[^<>]*>[\r\n]*)|(?=[\r\n]*))|(?=[\r\n]*))'Usi", $document, $elements);
        // catenate the matches
        $match = implode("\r\n", $elements[0]);
        // return the links
        return $match;
    }
    /*======================================================================*\
	Function:	_striptext
	Purpose:	strip the text from an html document
	Input:		$document	document to strip.
	Output:		$text		the resulting text
\*======================================================================*/
    function _striptext ($document)
    {
        // I didn't use preg eval (//e) since that is only available in PHP 4.0.
        // so, list your entities one by one here. I included some of the
        // more common ones.
        $search = array("'<script[^>]*?>.*?</script>'si" , // strip out javascript
"'<[\/\!]*?[^<>]*?>'si" , // strip out html tags
"'([\r\n])[\s]+'" , // strip out white space
"'&(quot|#34|#034|#x22);'i" , // replace html entities
"'&(amp|#38|#038|#x26);'i" , // added hexadecimal values
"'&(lt|#60|#060|#x3c);'i" , "'&(gt|#62|#062|#x3e);'i" , "'&(nbsp|#160|#xa0);'i" , "'&(iexcl|#161);'i" , "'&(cent|#162);'i" , "'&(pound|#163);'i" , "'&(copy|#169);'i" , "'&(reg|#174);'i" , "'&(deg|#176);'i" , "'&(#39|#039|#x27);'" , "'&(euro|#8364);'i" , // europe
"'&a(uml|UML);'" , // german
"'&o(uml|UML);'" , "'&u(uml|UML);'" , "'&A(uml|UML);'" , "'&O(uml|UML);'" , "'&U(uml|UML);'" , "'&szlig;'i");
        $replace = array("" , "" , "\\1" , "\"" , "&" , "<" , ">" , " " , chr(161) , chr(162) , chr(163) , chr(169) , chr(174) , chr(176) , chr(39) , chr(128) , "?" , "?" , "?" , "?" , "?" , "?" , "?");
        $text = preg_replace($search, $replace, $document);
        return $text;
    }
    /*======================================================================*\
	Function:	_expandlinks
	Purpose:	expand each link into a fully qualified URL
	Input:		$links			the links to qualify
				$URI			the full URI to get the base from
	Output:		$expandedLinks	the expanded links
\*======================================================================*/
    function _expandlinks ($links, $URI)
    {
        preg_match("/^[^\?]+/", $URI, $match);
        $match = preg_replace("|/[^\/\.]+\.[^\/\.]+$|", "", $match[0]);
        $match = preg_replace("|/$|", "", $match);
        $match_part = parse_url($match);
        $match_root = $match_part["scheme"] . "://" . $match_part["host"];
        $search = array("|^http://" . preg_quote($this->host) . "|i" , "|^(\/)|i" , "|^(?!http://)(?!mailto:)|i" , "|/\./|" , "|/[^\/]+/\.\./|");
        $replace = array("" , $match_root . "/" , $match . "/" , "/" , "/");
        $expandedLinks = preg_replace($search, $replace, $links);
        return $expandedLinks;
    }
    /*======================================================================*\
	Function:	_httprequest
	Purpose:	go get the http data from the server
	Input:		$url		the url to fetch
				$fp			the current open file pointer
				$URI		the full URI
				$body		body contents to send if any (POST)
	Output:
\*======================================================================*/
    function _httprequest ($url, $fp, $URI, $http_method, $content_type = "", $body = "")
    {
        $cookie_headers = '';
        if ($this->passcookies && $this->_redirectaddr)
            $this->setcookies();
        $URI_PARTS = parse_url($URI);
        if (empty($url))
            $url = "/";
        $headers = $http_method . " " . $url . " " . $this->_httpversion . "\r\n";
        if (! empty($this->agent))
            $headers .= "User-Agent: " . $this->agent . "\r\n";
        if (! empty($this->host) && ! isset($this->rawheaders['Host'])) {
            $headers .= "Host: " . $this->host;
            if (! empty($this->port))
                $headers .= ":" . $this->port;
            $headers .= "\r\n";
        }
        if (! empty($this->accept))
            $headers .= "Accept: " . $this->accept . "\r\n";
        if (! empty($this->referer))
            $headers .= "Referer: " . $this->referer . "\r\n";
        if (! empty($this->cookies)) {
            if (! is_array($this->cookies))
                $this->cookies = (array) $this->cookies;
            reset($this->cookies);
            if (count($this->cookies) > 0) {
                $cookie_headers .= 'Cookie: ';
                foreach ($this->cookies as $cookieKey => $cookieVal) {
                    $cookie_headers .= $cookieKey . "=" . urlencode($cookieVal) . "; ";
                }
                $headers .= substr($cookie_headers, 0, - 2) . "\r\n";
            }
        }
        if (! empty($this->rawheaders)) {
            if (! is_array($this->rawheaders))
                $this->rawheaders = (array) $this->rawheaders;
            while (list ($headerKey, $headerVal) = each($this->rawheaders))
                $headers .= $headerKey . ": " . $headerVal . "\r\n";
        }
        if (! empty($content_type)) {
            $headers .= "Content-type: $content_type";
            if ($content_type == "multipart/form-data")
                $headers .= "; boundary=" . $this->_mime_boundary;
            $headers .= "\r\n";
        }
        if (! empty($body))
            $headers .= "Content-length: " . strlen($body) . "\r\n";
        if (! empty($this->user) || ! empty($this->pass))
            $headers .= "Authorization: Basic " . base64_encode($this->user . ":" . $this->pass) . "\r\n";
            //add proxy auth headers
        if (! empty($this->proxy_user))
            $headers .= 'Proxy-Authorization: ' . 'Basic ' . base64_encode($this->proxy_user . ':' . $this->proxy_pass) . "\r\n";
        $headers .= "\r\n";
        // set the read timeout if needed
        if ($this->read_timeout > 0)
            socket_set_timeout($fp, $this->read_timeout);
        $this->timed_out = false;
        fwrite($fp, $headers . $body, strlen($headers . $body));
        $this->_redirectaddr = false;
        unset($this->headers);
        while ($currentHeader = fgets($fp, $this->_maxlinelen)) {
            if ($this->read_timeout > 0 && $this->_check_timeout($fp)) {
                $this->status = - 100;
                return false;
            }
            if ($currentHeader == "\r\n")
                break;
                // if a header begins with Location: or URI:, set the redirect
            if (preg_match("/^(Location:|URI:)/i", $currentHeader)) {
                // get URL portion of the redirect
                preg_match("/^(Location:|URI:)[ ]+(.*)/i", chop($currentHeader), $matches);
                // look for :// in the Location header to see if hostname is included
                if (! preg_match("|\:\/\/|", $matches[2])) {
                    // no host in the path, so prepend
                    $this->_redirectaddr = $URI_PARTS["scheme"] . "://" . $this->host . ":" . $this->port;
                    // eliminate double slash
                    if (! preg_match("|^/|", $matches[2]))
                        $this->_redirectaddr .= "/" . $matches[2];
                    else
                        $this->_redirectaddr .= $matches[2];
                } else
                    $this->_redirectaddr = $matches[2];
            }
            if (preg_match("|^HTTP/|", $currentHeader)) {
                if (preg_match("|^HTTP/[^\s]*\s(.*?)\s|", $currentHeader, $status)) {
                    $this->status = $status[1];
                }
                $this->response_code = $currentHeader;
            }
            $this->headers[] = $currentHeader;
        }
        $results = '';
        do {
            $_data = fread($fp, $this->maxlength);
            if (strlen($_data) == 0) {
                break;
            }
            $results .= $_data;
        } while (true);
        if ($this->read_timeout > 0 && $this->_check_timeout($fp)) {
            $this->status = - 100;
            return false;
        }
        // check if there is a a redirect meta tag
        if (preg_match("'<meta[\s]*http-equiv[^>]*?content[\s]*=[\s]*[\"\']?\d+;[\s]*URL[\s]*=[\s]*([^\"\']*?)[\"\']?>'i", $results, $match)) {
            $this->_redirectaddr = $this->_expandlinks($match[1], $URI);
        }
        // have we hit our frame depth and is there frame src to fetch?
        if (($this->_framedepth < $this->maxframes) && preg_match_all("'<frame\s+.*src[\s]*=[\'\"]?([^\'\"\>]+)'i", $results, $match)) {
            $this->results[] = $results;
            for ($x = 0; $x < count($match[1]); $x ++)
                $this->_frameurls[] = $this->_expandlinks($match[1][$x], $URI_PARTS["scheme"] . "://" . $this->host);
        } // have we already fetched framed content?
        elseif (is_array($this->results))
            $this->results[] = $results;
            // no framed content
        else
            $this->results = $results;
        return true;
    }
    /*======================================================================*\
	Function:	_httpsrequest
	Purpose:	go get the https data from the server using curl
	Input:		$url		the url to fetch
				$URI		the full URI
				$body		body contents to send if any (POST)
	Output:
\*======================================================================*/
    function _httpsrequest ($url, $URI, $http_method, $content_type = "", $body = "")
    {
        if ($this->passcookies && $this->_redirectaddr)
            $this->setcookies();
        $headers = array();
        $URI_PARTS = parse_url($URI);
        if (empty($url))
            $url = "/";
            // GET ... header not needed for curl
        //$headers[] = $http_method." ".$url." ".$this->_httpversion;
        if (! empty($this->agent))
            $headers[] = "User-Agent: " . $this->agent;
        if (! empty($this->host))
            if (! empty($this->port))
                $headers[] = "Host: " . $this->host . ":" . $this->port;
            else
                $headers[] = "Host: " . $this->host;
        if (! empty($this->accept))
            $headers[] = "Accept: " . $this->accept;
        if (! empty($this->referer))
            $headers[] = "Referer: " . $this->referer;
        if (! empty($this->cookies)) {
            if (! is_array($this->cookies))
                $this->cookies = (array) $this->cookies;
            reset($this->cookies);
            if (count($this->cookies) > 0) {
                $cookie_str = 'Cookie: ';
                foreach ($this->cookies as $cookieKey => $cookieVal) {
                    $cookie_str .= $cookieKey . "=" . urlencode($cookieVal) . "; ";
                }
                $headers[] = substr($cookie_str, 0, - 2);
            }
        }
        if (! empty($this->rawheaders)) {
            if (! is_array($this->rawheaders))
                $this->rawheaders = (array) $this->rawheaders;
            while (list ($headerKey, $headerVal) = each($this->rawheaders))
                $headers[] = $headerKey . ": " . $headerVal;
        }
        if (! empty($content_type)) {
            if ($content_type == "multipart/form-data")
                $headers[] = "Content-type: $content_type; boundary=" . $this->_mime_boundary;
            else
                $headers[] = "Content-type: $content_type";
        }
        if (! empty($body))
            $headers[] = "Content-length: " . strlen($body);
        if (! empty($this->user) || ! empty($this->pass))
            $headers[] = "Authorization: BASIC " . base64_encode($this->user . ":" . $this->pass);
        for ($curr_header = 0; $curr_header < count($headers); $curr_header ++) {
            $safer_header = strtr($headers[$curr_header], "\"", " ");
            $cmdline_params .= " -H \"" . $safer_header . "\"";
        }
        if (! empty($body))
            $cmdline_params .= " -d \"$body\"";
        if ($this->read_timeout > 0)
            $cmdline_params .= " -m " . $this->read_timeout;
        $headerfile = tempnam($temp_dir, "sno");
        exec($this->curl_path . " -k -D \"$headerfile\"" . $cmdline_params . " \"" . escapeshellcmd($URI) . "\"", $results, $return);
        if ($return) {
            $this->error = "Error: cURL could not retrieve the document, error $return.";
            return false;
        }
        $results = implode("\r\n", $results);
        $result_headers = file("$headerfile");
        $this->_redirectaddr = false;
        unset($this->headers);
        for ($currentHeader = 0; $currentHeader < count($result_headers); $currentHeader ++) {
            // if a header begins with Location: or URI:, set the redirect
            if (preg_match("/^(Location: |URI: )/i", $result_headers[$currentHeader])) {
                // get URL portion of the redirect
                preg_match("/^(Location: |URI:)\s+(.*)/", chop($result_headers[$currentHeader]), $matches);
                // look for :// in the Location header to see if hostname is included
                if (! preg_match("|\:\/\/|", $matches[2])) {
                    // no host in the path, so prepend
                    $this->_redirectaddr = $URI_PARTS["scheme"] . "://" . $this->host . ":" . $this->port;
                    // eliminate double slash
                    if (! preg_match("|^/|", $matches[2]))
                        $this->_redirectaddr .= "/" . $matches[2];
                    else
                        $this->_redirectaddr .= $matches[2];
                } else
                    $this->_redirectaddr = $matches[2];
            }
            if (preg_match("|^HTTP/|", $result_headers[$currentHeader]))
                $this->response_code = $result_headers[$currentHeader];
            $this->headers[] = $result_headers[$currentHeader];
        }
        // check if there is a a redirect meta tag
        if (preg_match("'<meta[\s]*http-equiv[^>]*?content[\s]*=[\s]*[\"\']?\d+;[\s]*URL[\s]*=[\s]*([^\"\']*?)[\"\']?>'i", $results, $match)) {
            $this->_redirectaddr = $this->_expandlinks($match[1], $URI);
        }
        // have we hit our frame depth and is there frame src to fetch?
        if (($this->_framedepth < $this->maxframes) && preg_match_all("'<frame\s+.*src[\s]*=[\'\"]?([^\'\"\>]+)'i", $results, $match)) {
            $this->results[] = $results;
            for ($x = 0; $x < count($match[1]); $x ++)
                $this->_frameurls[] = $this->_expandlinks($match[1][$x], $URI_PARTS["scheme"] . "://" . $this->host);
        } // have we already fetched framed content?
        elseif (is_array($this->results))
            $this->results[] = $results;
            // no framed content
        else
            $this->results = $results;
        unlink("$headerfile");
        return true;
    }
    /*======================================================================*\
	Function:	setcookies()
	Purpose:	set cookies for a redirection
\*======================================================================*/
    function setcookies ()
    {
        for ($x = 0; $x < count($this->headers); $x ++) {
            if (preg_match('/^set-cookie:[\s]+([^=]+)=([^;]+)/i', $this->headers[$x], $match))
                $this->cookies[$match[1]] = urldecode($match[2]);
        }
    }
    /*======================================================================*\
	Function:	_check_timeout
	Purpose:	checks whether timeout has occurred
	Input:		$fp	file pointer
\*======================================================================*/
    function _check_timeout ($fp)
    {
        if ($this->read_timeout > 0) {
            $fp_status = socket_get_status($fp);
            if ($fp_status["timed_out"]) {
                $this->timed_out = true;
                return true;
            }
        }
        return false;
    }
    /*======================================================================*\
	Function:	_connect
	Purpose:	make a socket connection
	Input:		$fp	file pointer
\*======================================================================*/
    function _connect (&$fp)
    {
        if (! empty($this->proxy_host) && ! empty($this->proxy_port)) {
            $this->_isproxy = true;
            $host = $this->proxy_host;
            $port = $this->proxy_port;
        } else {
            $host = $this->host;
            $port = $this->port;
        }
        $this->status = 0;
        if ($fp = @fsockopen($host, $port, $errno, $errstr, $this->_fp_timeout)) {
            // socket connection succeeded
            return true;
        } else {
            // socket connection failed
            $this->status = $errno;
            switch ($errno) {
                case - 3:
                    $this->error = "socket creation failed (-3)";
                case - 4:
                    $this->error = "dns lookup failure (-4)";
                case - 5:
                    $this->error = "connection refused or timed out (-5)";
                default:
                    $this->error = "connection failed (" . $errno . ")";
            }
            return false;
        }
    }
    /*======================================================================*\
	Function:	_disconnect
	Purpose:	disconnect a socket connection
	Input:		$fp	file pointer
\*======================================================================*/
    function _disconnect ($fp)
    {
        return (fclose($fp));
    }
    /*======================================================================*\
	Function:	_prepare_post_body
	Purpose:	Prepare post body according to encoding type
	Input:		$formvars  - form variables
				$formfiles - form upload files
	Output:		post body
\*======================================================================*/
    function _prepare_post_body ($formvars, $formfiles)
    {
        settype($formvars, "array");
        settype($formfiles, "array");
        $postdata = '';
        if (count($formvars) == 0 && count($formfiles) == 0)
            return;
        switch ($this->_submit_type) {
            case "application/x-www-form-urlencoded":
                reset($formvars);
                while (list ($key, $val) = each($formvars)) {
                    if (is_array($val) || is_object($val)) {
                        while (list ($cur_key, $cur_val) = each($val)) {
                            $postdata .= urlencode($key) . "[]=" . urlencode($cur_val) . "&";
                        }
                    } else
                        $postdata .= urlencode($key) . "=" . urlencode($val) . "&";
                }
                break;
            case "multipart/form-data":
                $this->_mime_boundary = "Snoopy" . md5(uniqid(microtime()));
                reset($formvars);
                while (list ($key, $val) = each($formvars)) {
                    if (is_array($val) || is_object($val)) {
                        while (list ($cur_key, $cur_val) = each($val)) {
                            $postdata .= "--" . $this->_mime_boundary . "\r\n";
                            $postdata .= "Content-Disposition: form-data; name=\"$key\[\]\"\r\n";
                            $postdata .= "Content-Type: text/plain; charset=utf-8\r\n\r\n";
                            $postdata .= "$cur_val\r\n";
                        }
                    } else {
                        $postdata .= "--" . $this->_mime_boundary . "\r\n";
                        $postdata .= "Content-Disposition: form-data; name=\"$key\"\r\n";
                        $postdata .= "Content-Type: text/plain; charset=utf-8\r\n\r\n";
                        $postdata .= "$val\r\n";
                    }
                }
                reset($formfiles);
                while (list ($field_name, $file_names) = each($formfiles)) {
                    settype($file_names, "array");
                    while (list (, $file_name) = each($file_names)) {
                        if (! is_readable($file_name))
                            continue;
                        $fp = fopen($file_name, "r");
                        $file_content = fread($fp, filesize($file_name));
                        fclose($fp);
                        $base_name = basename($file_name);
                        $postdata .= "--" . $this->_mime_boundary . "\r\n";
                        $postdata .= "Content-Disposition: form-data; name=\"$field_name\"; filename=\"$base_name\"\r\n\r\n";
                        $postdata .= "$file_content\r\n";
                    }
                }
                $postdata .= "--" . $this->_mime_boundary . "--\r\n";
                break;
        }
        return $postdata;
    }
}